The acronym for "Ignore More Like a Whore". It is commonly used as an online expression among friends for chatting. It is also used in texting. This word is directed towards people who ignore their friends who message them, but they don't respond back.

Brian: Hey Khevyn wsup
Brian: Hey are you there?
Brian: Wtfman where the hell are you respond!!!
Brian: Dude wtf man I need you to answer right now!!!!
Brian: IMLAW!!!!
Khevyn: Oh I was busy on the computer. I apologize.
Brian: FUCK YOU!!! IMLAW!!!!